The Queen's Gambit Declined Fortress

White's early Rc1 tries to make an exchange on c3 less damaging. We respond by striking with the c-pawn, then deciding when to exchange the b4 bishop and fix the queenside structure with c4. The important balance is between our space and White's bishop pair. Our plan is to finish development, support the pawn chain with b5, and use rook lifts when the queenside pawns need lateral protection.

1. Line 11.d4 d5 2.c4 e6 3.Nc3 Nf6 4.cxd5 exd5 5.Bg5 Bb4 6.Rc1 c5 7.e3 Bxc3+ 8.bxc3 c4 9.Ne2 Nbd7 10.Ng3 h6 11.Bf4 O-O 12.Be2 b5 13.O-O Re8 14.a4 bxa4 15.Qxa4 a5 16.Ra1 Ra6FreeLearn
2. Line 2… 15…a5 16.Rb1 Ra6 17.Qa3 Nf8 18.Be5 N8d7 19.Rfd1 a4Premium
3. Line 3… 9…Nbd7 10.Bf4 b5 11.Ng3 O-O 12.Be2 h6Premium
4. Line 4… 8…c4 9.e4 h6 10.Bxf6 Qxf6 11.e5 Qd8 12.Ne2 Nc6 13.Nf4 O-O 14.g3 b5 15.Bg2 Be6Premium
5. Line 5… 10…Qxf6 11.exd5 b5Premium

The queen on c2 supports the centre and makes a queen recapture on c3 available. We answer with a kingside space gain, then develop actively enough to justify the pawn commitments. The rook lift through h6 is a recurring route, while the king may castle on the opposite wing. Our main task is to coordinate the pieces before White opens the centre against our advanced pawns.

1. Line 11.d4 d5 2.c4 e6 3.Nc3 Nf6 4.cxd5 exd5 5.Bg5 Bb4 6.Qc2 h6 7.Bh4 g5 8.Bg3 Nc6 9.e3 h5 10.Bb5 h4 11.Be5 Bxc3+ 12.Qxc3 Bd7 13.Rc1 Rh6 14.Bxf6 Qxf6 15.h3 a6 16.Be2 O-O-OPremium
2. Line 2… 12…Bd7 13.Bxf6 Qxf6 14.h3 O-O-OPremium
3. Line 3… 12…Bd7 13.Bd3 Rh6 14.Bxf6 Qxf6 15.h3 Qe7Premium
4. Line 4… 13…Rh6 14.Ne2 Ne4 15.Bxe4 dxe4Premium
5. Line 5… 11…Bxc3+ 12.bxc3 Rh6 13.Rb1 Ne4 14.f3 Nd6 15.Bxd6 Qxd6Premium

With Nf3, White develops naturally and keeps several central setups available. We use the open c8 diagonal to develop the bishop to f5, then combine the c3 exchange with a knight transfer through e7 and g6. The kingside pawn advance gains useful space but needs central support. Our plan is to stabilise d5, activate the e-file rook, and choose the moment for g4 or queenside expansion.

1. Line 11.d4 d5 2.c4 e6 3.Nc3 Nf6 4.cxd5 exd5 5.Bg5 Bb4 6.Nf3 h6 7.Bh4 Bf5 8.Qa4+ Nc6 9.e3 O-O 10.Bb5 g5 11.Bg3 Bxc3+ 12.bxc3 Ne7 13.Nd2 Ng6 14.h3 c6 15.Be2 Re8 16.O-O h5 17.Qb3 b5 18.a4 a6Premium
2. Line 2… 13…Ng6 14.O-O h5 15.f3 c6 16.Be2 Re8 17.Bf2 g4Premium
3. Line 3… 10…g5 11.Bxc6 Bxc3+ 12.bxc3 gxh4Premium
4. Line 4… 9…O-O 10.Rc1 g5 11.Bg3 Ne4 12.Nd2 Bxc3 13.bxc3 Nxd2 14.Kxd2 a6Premium
5. Line 5… 7…Bf5 8.Qb3 Bxc3+ 9.bxc3 Nbd7Premium

The queen on b3 attacks both d5 and the b4 bishop, so passive defence can cost valuable time. We answer with c5 and active development, accepting structural damage when it opens useful files. The selected lines lead through a queen exchange into positions where our rook activity matters more than a neat pawn formation. Our plan is to use the d-file, challenge White's central pawns, and keep the bishops active.

1. Line 11.d4 d5 2.c4 e6 3.Nc3 Nf6 4.cxd5 exd5 5.Bg5 Bb4 6.Qb3 c5 7.dxc5 Nc6 8.O-O-O Qa5 9.Bxf6 gxf6 10.Nxd5 Qxc5+ 11.Qc2 Qxc2+ 12.Kxc2 Bf5+ 13.Kc1 O-O-O 14.f3 Be6 15.e4 f5 16.Bb5 Bc5 17.Ne2 fxe4 18.fxe4 a6 19.Ba4 Rhg8 20.Nef4 Bxd5 21.exd5 Be3+ 22.Kb1 Bxf4 23.dxc6 Rxd1+ 24.Rxd1 Rxg2Premium
2. Line 2… 19…Rhg8 20.g3 Bg4Premium
3. Line 3… 18…a6 19.Bd3 Bd6Premium
4. Line 4… 15…f5 16.Nh3 fxe4 17.fxe4 Bg4 18.Rd3 Bd6 19.Nf2 Be6Premium
5. Line 5… 15…f5 16.Bd3 Bxd5 17.exd5 Rxd5Premium

The queen check on a4 changes the move order and asks us to develop precisely. We block with Nc6, then question the g5 bishop and complete king safety before choosing a knight route. Exchanges on c3 can give us targets, while the queen may become active toward the kingside. Our plan is to secure d5, coordinate the last bishop, and use tempi against White's queen when it takes queenside pawns.

1. Line 11.d4 d5 2.c4 e6 3.Nc3 Nf6 4.cxd5 exd5 5.Bg5 Bb4 6.Qa4+ Nc6 7.e3 h6 8.Bxf6 Qxf6 9.Bb5 O-O 10.Ne2 a5 11.a3 Bxc3+ 12.bxc3 Ne7 13.O-O c6 14.Bd3 Bf5Premium
2. Line 2… 12…Ne7 13.Bd3 Bf5 14.Bxf5 Nxf5 15.Qd7 c6 16.Qxb7 Rfb8 17.Qc7 Qd6 18.Qxd6 Nxd6Premium
3. Line 3… 11…Bxc3+ 12.Nxc3 Ne7Premium
4. Line 4… 10…a5 11.O-O Ne7Premium
5. Line 5… 9…O-O 10.Bxc6 Bxc3+ 11.bxc3 bxc6 12.Nf3 Qg6 13.O-O Bh3 14.Ne1 Bg4 15.f3 Bf5Premium

White retreats the bishop to f4 rather than preserving the pin from h4. That gives us a chance to challenge d4 immediately with c5 and develop around the resulting central exchanges. Some lines leave changed queenside pawns, so activity on the c- and e-files must justify the structure. Our plan is to keep the bishops useful, contest White's queenside space, and meet pawn grabbing with central play.

1. Line 11.d4 d5 2.c4 e6 3.Nc3 Nf6 4.cxd5 exd5 5.Bg5 Bb4 6.e3 h6 7.Bf4 c5 8.Bb5+ Nc6 9.dxc5 O-O 10.Ne2 Bxc5 11.O-O a6 12.Bxc6 bxc6 13.Rc1 Ba7 14.Nd4 Bd7 15.Na4 Rc8 16.b4 a5 17.a3 axb4 18.axb4 Ne4 19.Nb3 Re8 20.Nac5 Bxc5 21.Nxc5 Nxc5 22.Rxc5 Qb6Premium
2. Line 2… 18…Ne4 19.Nc5 Qe7 20.Nxe4 Qxe4Premium
3. Line 3… 13…Ba7 14.Na4 Bg4 15.h3 Bxe2 16.Qxe2 Re8 17.Qc2 Re6Premium
4. Line 4… 16…Re8 17.Rxc6 d4Premium
5. Line 5… 14…Bg4 15.Rxc6 d4 16.exd4 Qe8Premium

By exchanging on f6, White removes a knight and aims for a more controlled positional game. We recapture with the queen, then develop the bishop actively and keep queen exchanges available when they help our coordination. King activity becomes important in the queenless lines, while the pawn structure can change on either wing. Our plan is to support d5, finish development, and choose active piece squares before making unnecessary pawn commitments.

1. Line 11.d4 d5 2.c4 e6 3.Nc3 Nf6 4.cxd5 exd5 5.Bg5 Bb4 6.e3 h6 7.Bxf6 Qxf6 8.Qb3 Qd6 9.a3 Bxc3+ 10.Qxc3 Bf5 11.Qb4 Qb6 12.Ne2 Nc6 13.Qxb6 axb6 14.Rc1 Kd7 15.Nc3 Ne7Premium
2. Line 2… 11…Qb6 12.Rc1 c6 13.Nf3 Nd7 14.Nd2 Qc7Premium
3. Line 3… 10…Bf5 11.Ne2 Nd7 12.Ng3 Bg6 13.Be2 h5 14.h4 Nf6 15.Qb4 Ke7 16.Kd2 Qxb4+ 17.axb4 a6Premium
4. Line 4… 11…Nd7 12.Qb4 Ke7Premium
5. Line 5… 9…Bxc3+ 10.bxc3 O-O 11.Bd3 b6Premium

The bishop retreat to e5 changes the usual chase along the kingside. We develop the knight to d7, recapture on f6 with the queen, and answer queen pressure with an active queen of our own. Several branches become tactical because both kings stay near the centre. Our plan is to combine checks with piece development, judging each material investment by the exact continuation rather than by a general attacking rule.

1. Line 11.d4 d5 2.c4 e6 3.Nc3 Nf6 4.cxd5 exd5 5.Bg5 Bb4 6.e3 h6 7.Bh4 g5 8.Bg3 h5 9.Be5 Nbd7 10.Bxf6 Qxf6 11.Qb3 Qb6 12.h4 gxh4 13.Qxd5 Bxc3+ 14.bxc3 Qb2 15.Rd1 Qxc3+ 16.Rd2 Qc1+ 17.Ke2 Nb6 18.Qe5+ Be6 19.Qxh8+ Kd7 20.Qh7 Bc4+ 21.Rd3 Rg8 22.Qf5+ Kd8 23.Nh3 Rg4 24.Nf4 Rxf4 25.exf4 Qc2+ 26.Ke3 Qc1+ 27.Kf3 Bd5+ 28.Ke2 Qc2+ 29.Ke1 Qb1+Premium
2. Line 2… 14…Qb2 15.Qe4+ Kf8 16.Rb1 Qxc3+ 17.Kd1 Nc5Premium
3. Line 3… 15…Kf8 16.Rd1 Qxc3+ 17.Rd2 Qc1+ 18.Ke2 Rh6Premium
4. Line 4… 12…gxh4 13.Nf3 Nf6 14.Rxh4 Be7 15.Bd3 Be6Premium
5. Line 5… 11…Qb6 12.a3 Be7Premium

White uses h3 to give the bishop a retreat and to keep a compact pawn cover. We occupy e4, exchange the g3 bishop, and advance h4 to gain time against the recapturing knight. The resulting positions are unusual: our king may remain central and the pawn structure can open through en passant. Our plan is to reinforce d5, coordinate the queen, and use forcing central play before White settles.

1. Line 11.d4 d5 2.c4 e6 3.Nc3 Nf6 4.cxd5 exd5 5.Bg5 Bb4 6.e3 h6 7.Bh4 g5 8.Bg3 h5 9.h3 Ne4 10.Ne2 Nxg3 11.Nxg3 h4 12.Nh5 c6 13.Bd3 Qe7 14.O-O f5 15.a3 Bd6 16.g4 hxg3 17.fxg3 Kd8 18.Bxf5 Qxe3+ 19.Kh1 Bxf5 20.Rxf5 Nd7 21.Qg4 Kc7Premium
2. Line 2… 14…f5 15.g4 hxg3 16.fxg3 Qxe3+ 17.Kh2 Qxd4 18.Nxd5Premium
3. Line 3… 16…Qxe3+ 17.Kg2 Kd8Premium
4. Line 4… 13…Qe7 14.Ng7+ Kf8 15.Nf5 Bxf5 16.Bxf5 Nd7Premium
5. Line 5… 13…Qe7 14.a3 Bd6 15.Bf5 Bd7 16.Bxd7+ Nxd7 17.Ng7+ Kf8 18.Nf5 Qe6Premium

The immediate h4 challenges our kingside pawn chain and can open lines before either king is safe. We answer with central knight activity, develop the bishop to g4, and prepare long castling. The selected continuations show why development and concrete tactics must support every pawn advance. Our plan is to activate the d-file rook, contest White's centre with c5, and keep the queen close to the exposed king positions.

1. Line 11.d4 d5 2.c4 e6 3.Nc3 Nf6 4.cxd5 exd5 5.Bg5 Bb4 6.e3 h6 7.Bh4 g5 8.Bg3 h5 9.h4 Ne4 10.Ne2 Bg4 11.Qb3 Nxg3 12.Nxg3 Nc6 13.Ne2 Qd6 14.hxg5 O-O-O 15.a3 Ba5 16.O-O-O Kb8 17.f3 Bc8 18.Nf4 Ne7 19.Bd3 c5 20.Nb5 Qb6 21.dxc5 Qxc5+ 22.Bc2 Nf5 23.Rxd5 Rxd5 24.Nxd5 Be6 25.e4 a6 26.Rd1 Rd8 27.Nbc3 Nd4 28.Qa4 Bxc3 29.bxc3 Ne2+ 30.Kb2 Rxd5 31.exd5 Qxc3+ 32.Kb1 Qe3Premium
2. Line 2… 14…O-O-O 15.f3 Bf5 16.Kf2 h4Premium
3. Line 3… 14…O-O-O 15.O-O-O Bxc3 16.Qxc3 Qe7Premium
4. Line 4… 13…Qd6 14.f3 Bf5 15.hxg5 O-O-OPremium
5. Line 5… 13…Qd6 14.a3 Ba5 15.hxg5 O-O-OPremium

After Qb3 and the exchange on c3, White recaptures with the b-pawn to strengthen the centre. We chase the bishop with h4 and develop the d7 knight so that exchanges on f6 leave an active knight. The central e4 square and queenside pawn chain guide our play. Our plan is to secure the advanced centre, mobilise the rooks, and meet c4 with coordinated pieces rather than isolated pawn moves.

1. Line 11.d4 d5 2.c4 e6 3.Nc3 Nf6 4.cxd5 exd5 5.Bg5 Bb4 6.e3 h6 7.Bh4 g5 8.Bg3 h5 9.Qb3 Bxc3+ 10.bxc3 h4 11.Be5 Nbd7 12.Bxf6 Nxf6 13.Bd3 c6 14.h3 Rg8 15.Rb1 Ne4 16.Bxe4 dxe4 17.Ne2 b5 18.Qc2 f5 19.a4 a6 20.c4 Qa5+ 21.Nc3 Be6 22.cxb5 cxb5 23.axb5 Rc8 24.Kd2 axb5 25.Rxb5 Qxb5 26.Nxb5 Rxc2+ 27.Kxc2 Ke7Premium
2. Line 2… 17…b5 18.a4 a6 19.c4 Be6Premium
3. Line 3… 14…Rg8 15.Nf3 Ne4 16.Rb1 Nd6Premium
4. Line 4… 13…c6 14.Nf3 Ne4 15.Qc2 h3 16.g3 Bf5 17.O-O Qe7Premium
5. Line 5… 12…Nxf6 13.Nf3 Ne4 14.Bd3 h3 15.g3 O-O 16.Qc2 Bf5 17.O-O Qe7Premium

White's queen recapture on c3 keeps the pawn structure cleaner but allows us to develop with tempo. We use Nc6 and h4, then exchange the bishop on e5 before placing a knight on e4. Queen moves and knight attacks become closely connected throughout the chapter. Our plan is to develop the b7 bishop when available, activate the d-file, and use central pawn breaks to support our pieces.

1. Line 11.d4 d5 2.c4 e6 3.Nc3 Nf6 4.cxd5 exd5 5.Bg5 Bb4 6.e3 h6 7.Bh4 g5 8.Bg3 h5 9.Qb3 Bxc3+ 10.Qxc3 Nc6 11.Bd3 h4 12.Be5 Nxe5 13.dxe5 Ne4 14.Qa3 b6 15.Ne2 Nc5 16.Rd1 Qe7 17.Bb5+ Bd7 18.Bxd7+ Nxd7 19.Qa4 a5 20.Rxd5 O-O-O 21.Qe4 Nc5 22.Qf5+ Kb7 23.Rd4 Ne6 24.Rc4 Qd7 25.O-O Qd3 26.Qf3+ Qd5Premium
2. Line 2… 15…Nc5 16.O-O Qe7 17.f4 gxf4 18.exf4 Nxd3 19.Qxd3 Bb7 20.Qh3 c5Premium
3. Line 3… 14…b6 15.Bxe4 dxe4 16.Rd1 Qe7 17.Qa4+ Kf8 18.Qxe4 Rb8Premium
4. Line 4… 14…b6 15.Rd1 Nc5 16.Bb5+ Bd7 17.Bxd7+ Qxd7Premium
5. Line 5… 16…Bd7 17.Rxd5 Bxb5 18.Rxd8+ Rxd8Premium